Specific Scaffold – §1926.452(m)Crawling boards (chicken ladders)

Crawling boards (chicken ladders).


(1) Crawling boards shall extend from the roof peak to the eaves when used in connection with roof construction, repair, or maintenance.

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(2) Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability).

  • Crawling boards must be not less than 10 inches wide and 1 inch thick.
  • Cleats on crawling boards must
    • Be equal in length to the width of the board.
    • Be spaced at equal intervals not to exceed 24 inches.
    • Have a minimum cross-sectional area of 1 x 1½ inches.